Macroinvertebrate communities in two salt affected tributaries of the Hopkins Rives,Victoria |
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| Authors: | B D Mitchell K Richards |
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| Institution: | (1) Faculty of Aquatic Science, Deakin University, P.O. Box 423, 3280 Warrnambool, Victoria, Australia |
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| Abstract: | Macroinvertebrate communities were studied in two saline tributaries of the Hopkins River, western Victoria. Monthly sampling
from May to August, 1990, showed the mean salinity of Bushy Creek was 5 g L−1 while in Back Creek mean salinity varied from 9 to 20 g L−1 between sites. Macroinvertebrate species richness and relative abundance were measured on each sampling occasion. Cluster
analysis showed that community composition varied between creeks and between sites within a creek. Bushy Creek sites were
more similar to each other than to Back Creek sites. A negative relationship was found between site salinity and species richness
over the range 4 to 26 g L−1, although there was a wide range of salinity (up to 12 g L−1) over which the relationship of species richness to salinity was not clear cut.
The effects of salinity on species richness in stream communities appear to be similar to that described elsewhere in salt
lakes. |
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| Keywords: | macroinvertebrates salinity streams species richness Australia |
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